Application of IPv6 Multicast Technology in Modern Distance Education

IPv6 provides many high-quality service functions, especially the multicast technology, which changes the traditional transmission mode of data streams and overcomes the shortcomings of unicast and broadcast. Modern distance education can use these advanced functions to promote its own development.

(1) feasibility of applying IPv6 Multicast technology to Modern Distance Education

1. The coverage rate of distance learning is improved.

Due to the wide range of IPv6 multicast addresses, anyone in the world can have an independent IP address belonging to a multicast group, so that every student can connect to the Internet for learning.

2. Solved the channel congestion problem in network transmission.

Multicast can greatly save network bandwidth, because no matter how many destination addresses there are, only a single packet is transmitted on any link of the network. Applying Multicast technology to distance education can improve data transmission efficiency and reduce the possibility of congestion on the backbone network.

3. enrich teaching resources to ensure Network Security

Multicast can be used to transmit streaming media information to provide learners with a variety of learning resources. IPv6 also provides a strict security mechanism and strict identity authentication mechanism, this ensures the security of data transmitted over the network and the security of network servers. As a result, more and more educational resource providers place their educational resources on servers, allowing more network learners to use them.

4. Real-Time Network Teaching

Because IPv6 has changed the original data transmission and packet separation methods, more data can be run on the same network bandwidth, so that video and audio streaming media can be transmitted in normal networks, this makes it possible to switch from one-way communication to two-way interaction. In addition, learners can also achieve personalized teaching and remote immersive teaching through video-on-demand and virtual classrooms, which will undoubtedly help improve the quality of distance education.

(2) Implementation of an IPv6 multicast Distance Education Model

Due to the advantages of multicast and the maturity of technology, it is feasible to apply it to modern distance education. Based on the in-depth research on the current IP multicast technology and modern distance education, this paper attempts to build a Remote Education Model Based on IP multicast, this model can implement real-time Synchronous Teaching and non-real-time Asynchronous Teaching.

Real-time Synchronous Teaching: teachers teach or report on-site in the electronic classroom, which is sent to the multicast source server after being processed into digital signals by the camera system and modulation system, IGMP is used to establish and maintain the relationship between the source server and multicast members, and transmit data signals to multicast members. Remote learners can use PCs to implement real-time listening. Because multicast uses the IPv6 packet format, the transmission speed is fast, and the signal delay is small, the teaching effect is satisfactory.

Asynchronous Teaching: The learning resources (such as video, audio, image, animation, and text) produced by the distance education center can also be transmitted to the multicast server through the teaching server, it is sent to members in multicast mode. Remote learners can download it to a local hard disk for learning.

IPv6 Multicast technology provides a new opportunity for the development of distance education. Using IP multicast in distance education brings many benefits. However, any technology has its own limitations and disadvantages. IP multicast also needs to be improved and improved, for example, copying unreliable information packets will not only waste a certain amount of network bandwidth, but also affect the security of the system. However, with the development of the Internet, multicast technology will certainly promote the new development of modern distance education!